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qaz13

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qaz13

biology

what is the difference between drug trials and clinical trials?
15:27 Fri 05th May 20063 answers, last by holbreck 00:58 Sat 03rd Jun 2006
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qaz13

plants

What is cohesion-adhesion and what is the cohesion-tension theory? I have looked through books and websites but nothing is clear.
12:53 Fri 05th May 20064 answers, last by shammydodger 15:31 Mon 08th May 2006

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